I don't believe the keyboard perforator requires the shaft to be rotating, but I could be wrong. You can certainly punch from keyboard faster than the character rate dictated by the main shaft rotation.

On 2023-09-23 14:32, Nick England wrote:

I tried to help out a fellow with a M19 today - and I know nothing about that era equipment - first time I had touched one. So no surprise that I wasn't too helpful figuring out where a stray wire was supposed to go. 

 

Symptom - This punch magnet is always on in T and KT, off in K.

 

Question 1 - can you remove and standalone test just the keyboard/perf assembly with 120vdc (obviously having to rotate the driveshaft by hand).

 

Question 2 - is the punch magnet supposed to only get activated by the closure of the cam contact on the keyboard shaft? Or is it one of those oddball things that is always on except to punch via spring power?

 

Question 3 - is there a good simplified WD for a dummy like me?

 

Thanks,

Nick the M28 guy

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